Abrasive stone holder



Sept. 1, 1931. F. J. JESCHKE ABRASIVE STONE HOLDER Filed June 30, 1928 JNVENTOR. Wank c/ c/eschke wa d/W A TTORNEYS Patented Sept. 1, 1931 UNITED STATES PATENT OFFICE FRANK J. JESCHKIL-OF DETROIT, MICHIGAN, ASSIGNOB TO MIOROMATIC HONE COB- IPORATION OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN ABRASIVE STONE HOLDER Application filed .Tune 30,

My invention relates to an improved holder for an abrasive stone to be used in a grinding tool.

The holder is adapted to support the stone upon the tool in a suitable manner such as is shown in my applications, Serial Nos.

239,858247,785. Holders of, this general type are shown in such applications but are not therein specifically. claimed though referonce is made thereto asa disclosure.

Tlhelpresent application'relatesto such a holder as amounting for thestone. V

An object is to provide, in conjunction w th a supporting base member, a stone fitted with an improved back structure. receivable upon said base member and adapted to be releasably secured thereto and to various improve structural features inherent in such combination as here illustrated.

Various advantages, improved features, and structural elements will appear more fully from the following description, appended claims and accompanying drawings, wherein, r

Fig. 1 is a perspective of an embodiment of my invention.

Fig. 2 is a vertical sectional view taken on line 22 of Fig. 1.

Fig. 3 is a side elevation partly in section of a slightly modified form of my invention.

Fig. 4 is a cross-sectional view taken on line fr-4. of Fig. 3.

My invention embodies in an abrasive holder a base member indicated in the several figures as 10 which, in Figs. 1 and 2, is shown as having tapered or cam faces at its opposite ends indicated as 12, and in Figs. 3' and 4 as having cam faces formed on an intermediate part of the base member indicated 40 bythenumeral 14. These cam facesare engaged by adjustable devices" carried by the tool equipped with these abrasives and such structure forms no material part of the invention here claimed; 5

Each base member has' formed on the. side opposite the cam faces a channel 16, within which the abrasive stone 18 is-seated. This abrasive stone is provided with a metal back late 20 which is cemented or otherwise fas- 50 tened about the stone 18, and in Figs. 2 and 4 REl'SSUED cement is shown at 22 as employed for this purpose.

In Fig. 1 the bottom of the metal channel back member 20 has its extending end portions bent upwardly as at 24 engaging opposite ends of the stone to assist in positioning the stone securely therein. Such end .por- 'tion of the back member is in each case ex- 1 tended and shaped to form a hook 26, all for the purpose as described in pending applications hereinabove referred to.

The metal back plate carried by each stone is provided with radial and cylindrical extensions in the form of nipples 28 which are received within corresponding apertures 30 that extend transversely through the base 1928. Serial No. 289,870.

d member 10. In Figs. 1 and 2 these nipples are shown as seating against a shoulder in said apertures 30 and are interiorly threaded to receive screws 32 which extend through. the apertures and engage the nipples.

In Figs. 3 and 4 the screws are dispensed with and the nipples seat within recesses in the form of apertures indicated by the same numerals and this serves to hold thestone in position. This type of mounting possesses many advantages over engaging the stone itself with fastening devices of one sort or another within a base member.

What I claim is:

1. An abrasive element for a rinding tool comprising, in combination, a ase member having a channel supporting face provided with apertures extending therefrom through the base member, an abrasive stone having a metal back plate adapted to seat within the channel of the base and upon the supportin upon the bottom thereof and having a nipple receivable within said recess to lock the stone therein against displacement.

3. An abrasive element for a grinding tool comprising, in combination, a base member provided on one side with two relatively angularly arranged cam faces and on the opposite side with a supporting face and apertures extending through the base member between said cam faces and opening into the supporting face, an abrasive stone carrier seated upon said supporting face provided with projecting portions engaged within said apertures to hold the stone in position.

4. An abrasive element for a grinding tool comprising, in combination, a base member having a supporting face, an abrasive stone carrier member seated upon said face, abutments on the base member engaging opposite sides of said stone carrier member, and interengaging portions formed on the stone carrier member and base member, one of said members beingprovided. with a substantially cylindrical opening and the other being provided with an interengaging radial extension.

5. An abrasive element for a grinding tool comprising, in combination, a base member having a supporting face. an abrasive stone seated thereon and provided with a metal back extending beyond and bent to engage the ends of the stone and terminating in hooks, and means engaging the metal back of the stone to the base.

6. An abrasive element for a grinding tool comprising, in combination, a base member having a supporting face, an abrasive stone seated thereon and provided with a metal back extending beyond the ends of the stone and bent at its ends to engage therewith to prevent longitudinal displacement of the stone, and means engaging the metal back of the stone to the base to secure the stone in place thereon.

An abrasive element for a grinding tool comprising, in combination, a base member having a channel for an abrasive stone, an abrasive stone seated within said channel, said stone provided with a metal channel back and-means engaging the metal back of the stone to the base member to secure the stone in place thereon.

8. An abrasive element for a grinding tool comprising an abrasive stone and a metal back therefor extending beyond the stone and terminating in a hook.

9. An abrasive element for a grinding tool comprising an abrasive stone and a metal back therefor extending beyond thegstone, said extension being bent over the end of the stone.

10. An abrasive element for a grinding tool comprising an abrasive stone and a metal back therefor extending beyond the stone,

FRANK J. JESCHKE. 

